Install the PSU Blocker sides using (2) M4 x 12 screws and washers per side (In base electronics hardware pack - 84493).
WARNING: Don’t forget the washers in this step! The 1mm spacing they provide prevents the screws from contacting electrical components on the inside of the PSU. Failure to include these washers can cause the PSU to fail.
If you are located in the US, make sure the 220/110 switch is in the 110 (115) position, as indicated by the arrow. This defines the input voltage the power supply expects.
If you're in a country where 220v is the standard, make sure the switch is on the 220 setting.
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